Space Crossword

12345678910
Across
  1. 1. The hottest planet
  2. 5. 20 to several thousand galaxies
  3. 6. Equal length in day and night
  4. 9. Hottest layer in the Sun's atmosphere
  5. 10. Colourful lights caused by solar winds
Down
  1. 2. Celestial objects passing through a shadow or between a light source
  2. 3. Nuclear _______; how the Sun produces energy
  3. 4. Swirling cloud of gas and dust
  4. 7. Where a complete eclipse occurs
  5. 8. Causing the loss of bone and muscle mass
  6. 9. Leftover heat radiation from the Big Bang